FROM BENCH TO BIOSPHERE: INTEGRATING SAFE-AND-SUSTAINABLE-BY-DESIGN PRINCIPLES INTO THE NEXT GENERATION OF NANOMATERIALS — GREEN SYNTHESIS, HAZARD ENGINEERING, AND LIFE-CYCLE GOVERNANCE
DOI:
https://doi.org/10.56238/revgeov17n6-096Keywords:
Safe-And-Sustainable-By-Design (SSbD), Green Synthesis of Nanomaterials, Structure–Property–Hazard Relationships, Life Cycle Assessment (LCA), Nanomaterial Risk AssessmentAbstract
The trajectory of nanotechnology innovation now stands at a critical juncture: will the next generation of nanomaterials perpetuate the reactive hazard-management paradigm of the past, or will it embrace a proactive integration of safety, sustainability, and performance from the earliest conceptual stages? This review articulates a forward-looking vision for safe-and-sustainable-by-design (SSbD) nanotechnology, tracing the intellectual and practical pathways from laboratory synthesis to environmental fate—from bench to biosphere. We synthesize evidence from 182 peer-reviewed studies to demonstrate how green chemistry principles, structure–property–hazard engineering, prospective life cycle assessment (LCA), and iterative biological screening converge to enable rational design of nanomaterials that minimize intrinsic risk while delivering functional excellence. Quantitative findings underscore both progress and persistent challenges: biogenic synthesis routes eliminate toxic reagents; prospective LCA reveals that scale-up can reduce environmental impacts by approximately two orders of magnitude yet simultaneously expose trade-offs such as lower global warming potential coupled with elevated human toxicity and freshwater ecotoxicity; measured workplace exposures during nanomaterial processing range from 4.71×10³ to 1.75×10⁶ particles·cm⁻³, with respirable fiber concentrations reaching 0.13 fibers·cm⁻³ during grinding operations. Despite these advances, critical gaps remain: sparse ecotoxicity datasets, high LCA uncertainty at low technology readiness levels, limited environmental transformation data, and fragmented regulatory frameworks. This review provides a strategic roadmap for embedding SSbD principles into nanomaterial innovation pipelines, offering researchers, industry practitioners, and policymakers a comprehensive synthesis of current knowledge, actionable design strategies, and a clear-eyed assessment of the scientific and governance frontiers that must be crossed to realize truly sustainable nanotechnology.
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